FeatureCollectionLayerFromPortal.xaml

<UserControl x:Class="ArcGIS.WinUI.Samples.FeatureCollectionLayerFromPortal.FeatureCollectionLayerFromPortal"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:esriUI="using:Esri.ArcGISRuntime.UI.Controls">
    <Grid>
        <esriUI:MapView x:Name="MyMapView" />
        <Border Style="{StaticResource BorderStyle}">
            <Grid>
                <Grid.RowDefinitions>
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                </Grid.RowDefinitions>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="Auto" />
                    <ColumnDefinition Width="*" />
                </Grid.ColumnDefinitions>
                <TextBlock Grid.Row="0"
                           Grid.Column="0"
                           VerticalAlignment="Center"
                           FontWeight="SemiBold"
                           Text="Item ID:" />
                <TextBox x:Name="CollectionItemIdTextBox"
                         Grid.Row="0"
                         Grid.Column="1"
                         Margin="5,0,0,0"
                         HorizontalAlignment="Stretch" />
                <Button Grid.Row="1"
                        Grid.Column="0"
                        Grid.ColumnSpan="2"
                        Margin="0,5,0,0"
                        HorizontalAlignment="Stretch"
                        Click="Open_Click"
                        Content="Open from portal item" />
            </Grid>
        </Border>
    </Grid>
</UserControl>